Actualización de RAM y Disco duro SATA de Mac Intel 21.5" Retina 4K Display (2017) - Guía de reparación iFixit
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Amazon.com: OWC 1TB Aura Pro X2 NVMe SSD Actualización para modelos iMac de 27" y 21.5" (finales de 2013-2019) : Electrónica
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Apple iMac with 21.5in Retina 4K display (1TB HDD, Intel Core i3 8th Gen. 3.60 GHz, 8GB) Gray - MRT32LL/A (March, 2019) for sale online | eBay
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